The top four??

So I've been watching these boards for a little while just lurking and looking into DVC. When you all speak of going with one of the "top four" brokers, who are those four? (Can you say that on the DISboards?)

I know of The Timeshare Store and Fidelity. Who else is trustworthy? Also, saw one I liked tonight at Fidelity and of course they are closed until Monday or maybe later because of the holiday. How do you contact them (or can you) on the weekends?